Bushing puller



Nov. 18, 1952 M. cLAPs I BUSHING FULLER Original Filed March 4, 1946INVENTOR. Mic/zae/ C /o 0s BY W Arron/Er Patented Nov. 18, 1952 MichaelGlaps;.Denver, 6610:, assignor tu llanr-yynaowen, Denver, Colo.

Continuation: of application Serial; Nth. 651325;

Sofia/1N6. 383999 1. .Claim-.

Thi'szapplieatibnz is? a clinfinuatihn' of: ape pflicatiom *NQLL651,725; filed-March 4;; 19116. 5, nowe ab andoned for; amimprovementimbushing}: Ruler.

The; invention; relates.- to. bushing; pullers.- and more particularlyto-one which: is? well adaptedforlpulling biind bushingsi One=oithe-objects of.- thelinvention'is to produceza bushingpullerwhiehisisimple and sturdy invconstructionn economical to manufacture andeflicientlinuse.

Another obiectflis tozproduce. a-bushing puller which doesinot. employvvexpansible resilient pulling fingers thusl eliminatin expensive materialand'manufa-cturing costs.

A-iurther ObjB'GU-i-SwtO produce a bushing puller which is provided withindependent pulling elements that can: bes readi-ly;raplacedf t low costin event of breakage or damage andithereby provide for'a considerablesavings over; the purchase. price of a complete new puller.

Other objeets of my-inventien-will-become apparent-from the following;description takenin connection with the accompanying drawings. showing apreferred bushing-g, puller construction:

In the drawings:

Figures 1 15:13, perspective View of the bushing puller; V

Figures 2. is a view of the puller withtzpartsi brokenaw-ay; and insectionto? show details: or construction; and manner of cooperatiomoffthe: parts; t

Figure 3 is a. view of one of the pulling members; and

Figure 4 is a view showing the puller in readiness topull a blindbushing.

Referring to the drawings in detail, it will be noted that my improvedbushing puller comprises essentially four parts, namely, a rod or shaftI, a nut or block 2 and two pulling members 3 and 4. The red I isprovided intermediate its ends with threads 5 and at its outer end hasassociated therewith a turning handle 6 in the form of a slidable crossrod. The inner end of the rod which is adapted to engage a suitableabutment is formed with a bevel I, the purpose of which will becomeapparent.

The nut or block 2 is formed with a threaded bore 8 at its outer endwhich communicates with a, larger smooth wall bore 9 at its inner end.The block or nut is arranged to be mounted by means of its threaded boreon the threads 5 of the rod.

The two bushing puller members 3 and 4 are of like construction, beingof slightly less curvappli'cation Jlllyl 1651948 type of" slot? I I.having its open" side extending-';

toone edge ef -the member; These-slots l.l:- are: arrangedto receivepinsl2 carriedby theblock or nut.- The=pii1s are:diametricallyppposed toeach other andthe inner ends thereof extend into the bore 9substantially the distance;- oiz: the; radial 'thiclin'es's of thepullingmembers' 3 and. 4% The sizeof 'the pins: l2 issuchthat when'thetmembers 3 and 4 have the rod 5 received there s between" the pins canslide in thespaces: be *"tween the adjacent longitudinal" edges of the"members and to a positionwhere they can be received in the s1ots- HIcya"- remnve movement between the' memb'ers' and the nut-or block- 2.

Hr using the improved bushing puller the two pulling; members- 3 -a-nd 4am first inserted into the-bushing 13 which, as shown in Figuree, maybe'of the' blin d t'y-pe and moun'tediiia bore of a support M such as ahou-sing. lonesome-met that the pulling members 3 and f are of lesscurvatu'relength than'asemi-cylinder, they} can be placed withtheir-adjacent longitudinal" edgesin engagement soas to-allow forthe'fianges' N to pass through the bushing into the space at the innerend thereof. After the pullin members are inserted, the inner endportion of the rod I is inserted between the members and due to its sizeit thereby causes the members to be expanded so that the flanges I0 willassume positions where they can engage behind the inner end edge of thebushing as indicated in Figure 4. The beveled edge I at the inner end ofthe rod assists in inserting the rod in between the two pulling members.As the rod is inserted, the other ends of the pulling members will bereceived in the smooth large bore 9 of the nut or block and since themembers 3 and 4 are new in their spaced apart positions, the pins '2 ofthe nut can be received in the space between the adjacent longitudinaledgesof the members 3 and 4 and assume positions opposite the slots I I.The nut can then be twisted so that these pins l2 are moved into theslots to establish a connection between the nut and the pulling members3 and 4. To pull the bushing all that need now be done is to turn therod I so as to feed it through the nut or block. The inner end of therod will engage the end wall of the housing bore in which the bushing 13is mounted and, consequently, as the rod is turned, the nut or blockwill be moved longitudinally outwardly with respect to the rod and pullwith it the pulling members 3 and 4. Since the flanges H) of thesemembers are positioned behind the inner end edge of the bushing, thebushing will be pulled outwardly and thus be removed from the bore ofthe support. If the bushing to be pulled is in a bore open at both ends,a suitable abutment can be made for the beveled end of the rod toengage.

In connection with my improved bushing puller, it is to be particularlynoted that it is very simple in construction and that the parts thereofcan be easily and economically manufactured. I am aware that bushingpullers have been previously made, in which integral pulling members orfingers are carried by a nut or block similar to the nut or block 2, butin such type of puller the nut and fingers must be made of cost- 1ymaterial in order that the fingers can be resiliently attached to thenut. the pulling members 3 and 4 integral with the nut, the cost ofmanufacturing is considerably increased as many machining operationsmust be performed. By having the pullin elements 3 and 4 made separatelyfrom the nut, they can be readily replaced at a low cost in the eventthe pulling members become damaged or broken. The replacement cost Willbe considerably less than the cost of buying a complete new tool, or anintegral nut and finger, as would be the case where the bushing pullerwas constructed with the nut and the pulling members made from onepiece. The material for making my improved bushing puller need not beexpensive, as there is no necessity for the pulling members to beresilient to permit expansion.

Being aware of the possibility of modifications in the particularbushing puller shown and described withcut departing from thefundamental principles of my invention, I desire it to be understoodthat the invention is not to be limited in any manner except inaccordance with the appended claim.

What is claimed is:

In a puller for a bushing having a rear end edge free of any obstacle,said puller comprising two unitary independent elongated members Also,by having of semi-cylindrical shape provided at corresponding ends withshoulder means for engaging the rear end edge of the bushing to bepulled, a single rod of greater length than the members and having auniform diameter portion for insertion between the members, said rod andmembers being so related that'when said members are placed within abushing with the shoulder means beyond the rear end edge of the bushingand the rod subsequently inserted between the member said members willbe expanded uniformly throughout their length and the shoulder meanswill be held without wedging action so as to engage at the rear end edgeof the bushing and the ends of the members opposite those with theshoulder means will be supported by the rod, a member threaded on therod and having a cylindrical flange for surrounding said other end ofthe members to limit their expansion, and interengageable meanscomprising pins carried by the annular flange of the threaded member andslots in the sides of the independent elongated member for quicklyconnectin and disconnecting said members by relative turning movement ofthe threaded member with respect to the elongated members after the pinsare inserted between spaced longitudinal edges of the said members andthe single rod has been given a longitudinal movement inwardly relativeto the elongated members to cause them to be expanded and held withtheir shoulder means positioned to engage the rear edge of the bushing,said pins being the sole connection of the elongated members and otherparts of the bushing puller thus permitting easy hand removal.

MICHAEL CLAPS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,367,016 Campbell Feb. 1, 19211,464,693 Campbell Aug. 14, 1923 1,496,303 Dieringer June 3, 19241,504,650 Smith Aug. 12, 1924 1,515,247 Forsyth Nov. 11, 1924 1,569,614Clark Jan. 12, 1926 2,305,076 Graham Dec. 15, 1942 2,380,980 Looney Aug.'7, 1945

